Drilling-machine.



N0. 697,58l. Patented Apr. l5, 1902.

C. A.V WESSMAN.

DRILLING MACHINE.

(Application led Apr. 1. 1901-) (No Model.) '2 Shets-Shee l.

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No. 697,58l.

Patented Apr. l5, |902. C. A. WESSMAN.

DRILLING MACHINE.

(Application filed Apr. 1. 1901.)

2 Sheets-Sheet 2.

('No Model.)

C. f1. SM Igqagior,

UNITED STATESl PATENT OFFICE.

CARL A. VVESSMAN, OF CHICAGO, ILLINOIS.

`DFllLLlNG-IVIACHINE.

SPECIFICATION forming part f Letters Eatent No. 697,581, dated April 15, 1902.

Application flied April i, 14901.

To a/ZZ whom, it may concern:

Be it known that VI, CARL A. VESSMAN, a` citizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a new and useful Drilling-Machine, of which the following is a speci-V fication. Y

My invention is an improved drilling-machine; and it consists in the peculiar construction vand combination of devices hereinafter fully set forth and claimed.

The object of my invention is to provide improved means for increasing and decreasing the speed of the drill-shaft at will. i.

In the accompanying drawingsLEigure 1 is a side elevation of a drilling-machine constructed in accordance with my invention. Fig. 2 is a top plan view of the same. vFig.f3 is a detail section of the friction-gear for increasing and decreasing the speed of the drillshaft. Fig. 4 is a detail elevation of the -means for raising and lowering the Work-table. Fig. 5 is a detail sectional View taken on a plane indicated by theline b b of Fig. 4.

The standard 1 rises from the base 2 and has the cylindrical lower portion 3 and the arms 4 5 at its upper end. The arms 5 are provided with bearings 6 for the revoluble and vertically-adjustable drill-shaft 7, which is raised and lowered by the means usually employed in machines of this character and here shown. The Work-table 8 is carried by an arm 9, which is pivotally mounted and adapted to slide vertically on the cylindrical portion 3 of the standard. The pivotal collar 10 of said arm is provided with an adjusting-bolt 1l, with bearings 12, and Witha bearing 13. A vertically-disposed rackbar 14 bears against the cylindrical portion 3 of standard 1 and hasat its upper end a sleeve or annulus 15, which engages and is adapted to rotate on the said cylindrical portion of said standard. The said rack-bar passes through a groove or guideway 16 in one side of the pivotal collar 10 of supporting-arm 9 and is engaged bya worm 17, which is vertically disposed and is journaled in the bearings 12. A miter-gear 18V is fast on the upper end of the worm-shaft and is engaged by a similar gear 19 on a crank-shaft 20, which may be operated manually and is journaled in the bearing 13. By this means the work- Serial No. 53,869. (No model.)

table may be raised and lowered, as may be required, and may be swung from under the drill-shaft or disposed under the same.

An inclined shaft 21 is journaled in bearings 22, with which the arms 4 5 of standard 1 are provided. The said shaft 21 is geared to the revoluble drill-shaft 7 by beveled gears 23, as shown, and on the said shaft is a frictioncone 24, which is fast thereto. A power-*shaft 25 is jourualed in suitable bearings 26 at the upper ends of the arms 4 5. Said power-shaft has at its rear end a fast pulley 27 and a loose pulley 28. Said shaft further carries a cylindrical pulley 29, which is disposed opposite and in proximity to the upper side of the friction-cone 24. Adjusting-screws 30 are provided, by means of which the shaft 25 may be adjusted vertically in its bearings to cause the cylindrical pulley 29 to be moved toward or from the friction-cone 24, as may be required. Arms 31, which are horizontally disposed, project from one side of the bearings 26. The said arms support a longitudinally-movable shifting-rod 32, which is provided at its front end with a suitable handhold 33, which may be readily grasped by the operator. The said shifting-'rod carries a small pulley or sleeve 34, which is revoluble thereon andV is provided with pins or stops 35, which project from said shifting-rod at points at opposite ends of said pulley or sleeve. An endless friction-belt 36 connects the cylindrical pulley 29 and the sleeve or pulley 34. The said belt bears on the upper side of the friction-cone 24 and when the shaft 25 is in rotation causes the said friction-cone 24 to rotate, thereby rotating the drill-shaft. The desired friction is maintained and secured by adjusting the power-shaft 25 by the means hereinbefore described. By means of the shifting-rod 32 the friction-belt may be shifted longitudinally on the pulley 29 and frictioncone 24, and hence caused to bear on the latter at any desired point to increase or decrease the speed of the drill-shaft. The belt of speed.

IOG

posed between the pulley and the frictioneone maintains the friction between them under all conditions.

Having thus described my invention, I claim- In a drilling-machine, the combination of a standard having forked arms at its upper end, one of said arms being vertical, a drillshaft journaled in bearings on said vertical arms, an inclined shaft journaled in bearings in said forked arms and geared to said drill-shaft, a friction-cone on said inclined shaft, the upper side of said cone being disposed in a horizontal plane, a horizontallydisposed power-shaft, journaled in bearings on said forked arms and having fast and loose pulleys thereon, a cylindrical, elongated pul- CARL A. WESSMAN.

Witnesses:

VICTOR A. HELLsTRoM, OSCAR E. WILSON. 

